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A new, computer-based calculation shows that our solar system used to have 5 or 6, rather than 4 gas giants. It seems that, billions of years ago, we lost two planets due to an instability that probably also tilted Uranus’s axis and scrambled up its moons. Let’s have a look.
Paper: https://doi.org/10.1016/j.icarus.2026.117056
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#science #physics #planet #space #solarsystem